Buggy code:
protected static final int MAX_FRAME_DEPTH = JMeterUtils . getPropDefault ( "httpsampler.max_frame_depth" , 5 ) ; private static final Map < String , String > parsersForType = new HashMap < String , String > ( ) ; private static final String RESPONSE_PARSERS = JMeterUtils . getProperty ( "HTTPResponse.parsers" ) ; private static final boolean USE_CACHED_SSL_CONTEXT = JMeterUtils . getPropDefault ( "https.use.cached.ssl.context" , true ) ; private static final boolean REMOVESLASHDOTDOT = JMeterUtils . getPropDefault ( "httpsampler.redirect.removeslashdotdot" , true ) ; public HTTPSamplerBase ( ) { } public boolean getSendFileAsPostBody ( ) { } public boolean getSendParameterValuesAsPostBody ( ) { } public boolean getUseMultipartForPost ( ) { } public void setProtocol ( String value ) { } public String getProtocol ( ) { } public void setPath ( String path ) { } public void setPath ( String path , String contentEncoding ) { } public String getPath ( ) { } public void setFollowRedirects ( boolean value ) { } public boolean getFollowRedirects ( ) { } public void setAutoRedirects ( boolean value ) { } public boolean getAutoRedirects ( ) { } public void setMethod ( String value ) { } public String getMethod ( ) { } public void setContentEncoding ( String charsetName ) { } public String getContentEncoding ( ) { } public void setUseKeepAlive ( boolean value ) { } public boolean getUseKeepAlive ( ) { } public void setDoMultipartPost ( boolean value ) { } public boolean getDoMultipartPost ( ) { } public void setDoBrowserCompatibleMultipart ( boolean value ) { } public boolean getDoBrowserCompatibleMultipart ( ) { } public void setMonitor ( String value ) { } public void setMonitor ( boolean truth ) { } public String getMonitor ( ) { } public boolean isMonitor ( ) { } public void setImplementation ( String value ) { } public String getImplementation ( ) { } public boolean useMD5 ( ) { } public void setMD5 ( boolean truth ) { } public void addEncodedArgument ( String name , String value ) { } public void addEncodedArgument ( String name , String value , String metaData , String contentEncoding ) { } public void addEncodedArgument ( String name , String value , String metaData ) { } public void addNonEncodedArgument ( String name , String value , String metadata ) { } public void addArgument ( String name , String value ) { } public void addArgument ( String name , String value , String metadata ) { } public boolean hasArguments ( ) { } @ Override public void addTestElement ( TestElement el ) { } @ Override public void clearTestElementChildren ( ) { } public void setPort ( int value ) { } public static int getDefaultPort ( String protocol , int port ) { } public int getPortIfSpecified ( ) { } public boolean isProtocolDefaultPort ( ) { } public int getPort ( ) { } public void setDomain ( String value ) { } public String getDomain ( ) { } public void setConnectTimeout ( String value ) { } public int getConnectTimeout ( ) { } public void setResponseTimeout ( String value ) { } public int getResponseTimeout ( ) { } public String getProxyHost ( ) { } public int getProxyPortInt ( ) { } public String getProxyUser ( ) { } public String getProxyPass ( ) { } public void setArguments ( Arguments value ) { } public Arguments getArguments ( ) { } public void setPostBodyRaw ( boolean value ) { } public boolean getPostBodyRaw ( ) { } public void setAuthManager ( AuthManager value ) { AuthManager mgr = getAuthManager ( ) ; if ( ( HTTPSamplerBase . log . isDebugEnabled ( ) ) && ( mgr != null ) ) { <START_BUG> HTTPSamplerBase . log . warn ( ( ( ( "Existing<seq2seq4repair_space>AuthManager<seq2seq4repair_space>" + ( mgr . getName ( ) ) ) + "<seq2seq4repair_space>superseded<seq2seq4repair_space>by<seq2seq4repair_space>" ) + ( value . getName ( ) ) ) ) ; <END_BUG> } setProperty ( new org . apache . jmeter . testelement . property . TestElementProperty ( HTTPSamplerBase . AUTH_MANAGER , value ) ) ; } public AuthManager getAuthManager ( ) { } public void setHeaderManager ( HeaderManager value ) { } public HeaderManager getHeaderManager ( ) { } public void setCookieManager ( CookieManager value ) { } public CookieManager getCookieManager ( ) { } public void setCacheManager ( CacheManager value ) { } public CacheManager getCacheManager ( ) { } public boolean isImageParser ( ) { } public void setImageParser ( boolean parseImages ) { } public String getEmbeddedUrlRE ( ) { } public void setEmbeddedUrlRE ( String regex ) { } protected HTTPSampleResult errorResult ( Throwable e , HTTPSampleResult res ) { } private static final String HTTP_PREFIX = ( HTTPConstants . PROTOCOL_HTTP ) + ":////" ; private static final String HTTPS_PREFIX = ( HTTPConstants . PROTOCOL_HTTPS ) + ":////" ; private static final boolean SEPARATE_CONTAINER = JMeterUtils . getPropDefault ( "httpsampler.separate.container" , true ) ; public java . net . URL getUrl ( ) throws MalformedURLException { } public String getQueryString ( ) { } public String getQueryString ( String contentEncoding ) { } public void parseArguments ( String queryString , String contentEncoding ) { } public void parseArguments ( String queryString ) { } @ Override public String toString ( ) { } public SampleResult sample ( Entry e ) { } public SampleResult sample ( ) { } protected abstract HTTPSampleResult sample ( java . net . URL u , String method , boolean areFollowingRedirect , int depth ) { } protected HTTPSampleResult downloadPageResources ( HTTPSampleResult res , HTTPSampleResult container , int frameDepth ) { } private void setParentSampleSuccess ( HTTPSampleResult res , boolean initialValue ) { } private String getParserClass ( HTTPSampleResult res ) { } protected String encodeSpaces ( String path ) { } public void testEnded ( ) { } public void testEnded ( String host ) { }

Fix:
HTTPSamplerBase . log . debug ( ( ( ( "Existing<seq2seq4repair_space>AuthManager<seq2seq4repair_space>" + ( mgr . getName ( ) ) ) + "<seq2seq4repair_space>superseded<seq2seq4repair_space>by<seq2seq4repair_space>" ) + ( value . getName ( ) ) ) ) ;